<!DOCTYPE html>
<meta charset="utf-8">
<title>backdrop-filter: Filter input is at element bounds</title>
<link rel="author" href="mailto:masonf@chromium.org">
<link rel="author" href="mailto:flackr@chromium.org">
<link rel="help" href="https://drafts.fxtf.org/filter-effects-2/#BackdropFilterProperty">
<script src="../support/simulate-backdrop-blur.js"></script>

<!-- Expected: A white box with a blue border, surrounded by green.
     A red blurred region should be seen at the bottom of the white box.
     No green should be observed within the white box.
     No dark/black should be observed within the white box either. -->

<div class="greenbox top"></div>
<div class="greenbox right"></div>
<div class="greenbox bottom"></div>
<div class="redline"></div>
<div class="filterbox"></div>
<style>
.filterbox {
  position: absolute;
  width: 100px;
  height: 100px;
  top: 150px;
  left: 0px;
}
.greenbox {
  position:absolute;
  width: 160px;
  height: 50px;
  background: green;
}
.redline {
  position:absolute;
  width: 90px;
  height: 5px;
  top:245px;
  left:5px;
  background: red;
}
.top {
  top:100px;
  left: 0;
}
.right {
  top:130px;
  left: 102px;
  width: 58px;
  height: 150px;
}
.bottom {
  top:250px;
  left: 0;
  height: 60px;
}
</style>
<script>
  const filterBox = document.querySelector('.filterbox');
  simulateBackdropBlur(filterBox, Array.prototype.slice.apply(document.body.querySelectorAll('div')).filter(c => c != filterBox), 10);
</script>
